Abstract

There has been a recent in terest in high m agnetostriction m aterials for
m agnetostriction based stre ss/to rq u e sensor and actuator applications. Several
m aterials have been investigated w ith this aim, including Tefenol (Tbo.3Dyo.7Fe2),
SmFe2, and Galfanol (FesoGa2o). However, these m aterials have several
drawbacks for stress sesnor and actuator applications. Among these are low
sensitivity to magnetic field or stress, low chemical stability, high costs and lack
of mechanical strength.